A-10 Graph-Air® Annealed
Tool & Die Steel PRODUCT
PACIFIC A10 contains graphite particles distributed throughout the microstructure which gives it excellent machinability and good anti-seizing characteristics. Because of hardening from low temperature (1450/1500°F), its size change and distortion characteristics are both very low. A10 is perhaps the most stable of all tool steels through heat treatment.
Heat Analysis - ranges and limits %
Preheat at 1200/1250°F before raising to 1800/1925°F forging temperature. Do not forge below 1600°F.
Heat slowly and uniformly to 1410/1460°F and soak before cooling at a maximum rate of 15°F per hour to 950°F (cooling rate below 950°F is not critical). Typical annealed hardness is 235/269 HB.
Heat to 1200/1250°F and hold 1 hour minimum at temperature; cool in air.
Preheat at 1200/1250°F before raising to an austenitizing temperature of 1450/1500°F; hold at temperature 30 to 60 minutes. Cool in air (to 80/90°F for maximum hardness); typical as quenched hardness is 62/64 HRC.
Temper immediately at 350/800°F to an approximate hardness range of 62 to 55 HRC. Double tempering is suggested with cooling to room temperature between tempers.
Approximate Hardness, HRC
Shapes and Conditions Available
Annealed Rounds through 6" Diameter
SE® Flats & Squares from 1/2" through 3" Thickness